Interesting setting if one had a quick glance at it, but then after first two volumes, you beginning to feel that this is very very very one dimensional generic shonen storyline. It is the epitomy of Good vs Evil with plenty of unnecessary gores, impactless death. Sighed... only in manga. The world don't work that way!
Alright. The empire is evil, there's no doubt about that. The people who work for it are pretty much psychopath or mentally unstable. It's hard to understand or feel anything for them other than which one bite the bullet next. The hero is what you expect from a kid who cry a lot and have inflexible sense of justice, spewing nonsense about justice like you expect.
So, a corrupted absolute government with a gang who believed in their own sense of justice, rejecting the current regime and loves each other like a family... holy shit, it's like a shittier version of One Piece. There is nothing mature or funny about this story. It felt like the author tried too hard to give some reasons for why the villain do the thing they do like Oda's style, but just got it very wrong.
-- Constant power boosting
-- Bad guys after bad guys
-- Power of friendship
-- Unsophisticated Bosses
-- Wimpy, dumb-ass, moronic MC
-- Unrealistic Romance (Harem, nuff said).
-- Lackluster humors (It made what suppose to be a serious fight into a joke)
I thought this story was suppose to be mature, but it's not. The only adult thing is the pointless "gore" that the manga could done without. Don't expect complicated emotions and thoughts in this story and just enjoy it for what it suppose to be: A Shounen Adventure.